MD61 Thermal Conductor Gas Sensor （Model：MD61） User’s Manual Version: 1.6 Valid from: 2022-06-21 Zhengzhou Winsen Electronics Technology Co.

Statement This manual copyright belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways. Thanks for purchasing our product. In order to let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly in accordance with the instructions. If users disobey the terms or remove, disassemble, change the components inside of the sensor, we shall not...

Zhengzhou Winsen Electronics Technology Co., Ltd MD61 Thermal Conductor Gas Sensor The MD heat conduction gas sensor is made according to the principle that the total thermal conductivity of the mixed gas changes with the content of the gas to be analyzed. The detection element and the compensation element are paired to form an arm of the bridge. The resistance of the detection element becomes smaller when it encounters a gas with a larger thermal conductivity than air, and when it encounters a gas with a smaller thermal conductivity than air (air background), the output voltage of the bridge...

Zhengzhou Winsen Electronics Technology Co., Ltd Sensitivity and response characteristic Output signal dependency on working voltage Long term stability The absolute value of the drift in air is less than 2 mV per year, in 10%CH4 the absolute value of drift is less than 2mV. For a short period storage (in 2 weeks), the sensor need 8 hours preheating to stabilize, for long-term (more than one year) storage, it need more than 48 hours’ preheating. Email: [email protected]

Zhengzhou Winsen Electronics Technology Co., Ltd Cautions 1 .Following conditions must be prohibited 1.1 High Corrosive gas If the sensors are exposed to high concentration corrosive gas (such as H2S, SOX, Cl2, HCl etc.), it will not only result in corrosion of sensors structure, also it cause sincere sensitivity attenuation. 1.2 Alkali, Alkali metals salt, halogen pollution The sensors performance will be changed badly if sensors be sprayed polluted by alkali metals salt especially brine, or be exposed to halogen such as fluorine. 1.3 Touch water Sensitivity of the sensors will be reduced when...

Zhengzhou Winsen Electronics Technology Co., Ltd 2.6 Concussion If sensors meet strong concussion, it may lead its lead wire disconnected. 2.7 Usage Conditions For sensor, handmade welding is optimal way. The welding conditions as follow:  Soldering flux: Rosin soldering flux contains least chlorine  homothermal soldering iron  Temperature: lower than 350℃  Time: less than 5 seconds If disobey the above using terms, sensors sensitivity will be reduced. Zhengzhou Winsen Electronics Technology Co., Ltd Add: No.299, Jinsuo Road, National Hi-Tech Zone, Zhengzhou 450001 China Tel: +86-371-67169097/67169670...